When the magic mirror sends Abby and Jonah into the story of The Twelve Dancing Princesses to retrieve the crown ruby from the Kingdom of Douze, they follow the twelve sisters to the underground Dance Resistance Party where Abby learns she is not really a terrible dancer.

Abby is feeling slighted by not being chosen festival leader at school, and her brother Jonah thinks that a trip through the magic mirror is just what she needs--but when they find themselves in a strange version of the Princess and the pea, and Abby is tagged as the princess, who will be the next ruler of the Kingdom of Bog (which is very damp and infested with alligators), she is not so much complimented as desperate to find an alternate princess,...